Lord or deity name, now commonly used to direct at people who are surrounded by the 'ladies'. In many cases though, it can be sarcastically used to refer to people who never get laid. Variants of the same are Kanhaiyaa, Kishan etc.
This dude is the 'Krishnan' of our class.
Kanhaiyaa is at his job again.
Usually South Indian
Krishnan means Lord in the various languages of India
makes friends with lots of asians
strives to be the best they can be
Krishnan Guru Murphy on BBC news :D